Molding apparatus



March 8, 1932. J. EMERSON 1,848,467

MOLDING APPARATUS Filed April 28, .1928

Patented Mar. 8, 1932 OAUNITED STATES PATENT OFFICE 'JOHN EMERSON, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 INLAND GLASS WORKS, INC.,

, i 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS i HOLDING APPARATUS f Application led Apr1r28, 1928. Serial No. 273,462.

invention relates to glass molding apparatus and particularly to apparatus for rmolding glass globes and the like whereby glass material of' one color may be united with glass material ot another color and formed into a desiredl shape.

y In my copending application relating to glass globes and methods of. making them, Serial' No. 273,461 iiled April 28, 1928, I have setforth certain ditlcultieswhich have here- .toforelbeen experienced in the manufacture of articles such as glass globes and one of the primary objects of my present invention is to provide molding apparatus which will serve to obviate or overcome these diiiiculties. 'I Another and more speciiic object of my present invention is to provide molding apparatus having a mold cavity for receiving a predetermined quantity of glass of a certain color which is adapted, when a quantity ofy glass of another color is associated therewith, to eiect the union of said glass materials and determine the line of division between the united materials.

A further object of my present invention is to provide molding apparatus which consists of a plurality of molds whereby glass materials may be combined and progressively shaped, one of`r said molds being adapted to effect the initial union of materials so asl to present a distinct and uniform line of demarcation between said materials, and another of said molds being designed to effect the shapv inglof the glass materials into a desired form.

y with a cavityfor receiving a predetermined quantity of molten glass anda split upper .mold section cooperating with said lower section to effect the initial union of the predetermined quantity of glass with" glass material'of another color, a ysecond mold being provided forycom'pleting'the forming of the united glass materials into a inished article of desired shape.

Still another object of my invention is to provide simple, durable and eiiiciently operable molding apparatus for applying a very uniform coating of glass of one color upon glass of another color, said apparatus including a mold cavity for receiving a predetermined quantity or globule of colored glass and a quantity of glass of another color, an annular edge. portion being provided which serves to determine the line of division when said glass materials are united within the mold.

These and other objects will be more apparent from the following detailed description When considered in connection with the accompanying drawings wherein:

Figure l is a central vertical sectional view of a glass mold embodying features of my invention, a predetermined quantity of colored glass being disclosed in association therewith and a quantity of glass depending from a blow-pipe being positioned thereabove;

Figure 2 is a central vertical sectional view of the mold taken at right angles to the section shown in Figure l, the molten glass on the blow-pipe being shown combined with the predetermined quantity of coloredv glass;

Figure 3 discloses the combined arrangement of the glass materials after said materials have been removed from the mold shown in Figure 2 and subjected to a further blowing operation;

Figure 4 discloses a central vertical sectional view of another mold which is used to completelyshape the combined glass materials, dot and dash lines within the mold being shown to indicate the approximate size of the partially formed globe at the time it is associated with the mold;

Figure 5 is a plan view of the mold shown in Figures 1 and 2;

Figure 6 is a reduced plan view of the mold shown in Figure 4; and

Figure 7 is a front elevational view of the mold shown in Figure 6. i Referring now to the drawings wherein like numerals have been employed to designate similar parts throughout the various iigures, it will be observed that one embodiment of my invention 'resides in a mold which IY have indicated generally by the numeral 4. This mold 4 is comprised ofan upper split mold section 6 and a lower unitary mold section 8.- ;'Ihe upper moldsection 6 comprises two companionportions which are hinged yat 10, Figure 2 and which are provided With Suitable'.manipulating handles; 12, Figure 1 Y Inorder to properly associate'the mold'sec f tion 6 with the unitaryor base section'S, itis only necessary to swing the companionportions of said sections together by'gripping the handles 12 and to vcarry;-dovvelor guide pins 14 secured to a flange portion of thel secftion -6 int'oas'sociation' witlrsuitable openings provided within the basev Asection 8.

These guidevfpins 14 servefto. facilitate *thel proper registration ofthe cavityv16 presented! ,2,5

within thesection6 with acavity 18formed within'the mold section 8,r Figure 1. It will be observed that I lprovide anfannular edge portion 2O at thelower portion ofl the cavl f im v` iff* Inthe use of .the 1nold4 I first deposit ka YKpredetermined quantity "of .molten colored glass y22 within the cavity 18 and then carry another quantity of clear or crystal molten glass 24 supported at the lower eXtremityvo -a conventional blow-pipe 26, into association with said glass 22, as clearlyshown in F ig- ;ure 2.r The engagement ofthe glass24fwith f Y manner described'it'is only necessary, in orderto permit the 'removal of lsaid material i et romthe mold, to'again manipulate the handles A12 sonas to `swing the companion portions ofthe mold sectione6 outwardly. 1. `-Attention is now directed` toanother mold- "ing unit which I have-designated `generally bythe Ynumeral 28,.Figures 4, 6and7. ,This molding unit24- is similar .in functional chariacteristicsto "the mold. lsectionV 6 just VVde scribed, in that :the unit 28 is comprised ot a pair of companion [sections v30 which* are hinged at 32 and are provided with suitable manipulating handles 34.V After the .come

bined:` glass materials 22 and 24 are kremoved rfrom the mold additional'airis vadmittedthrough the blow-pipe 26 and in Figure 3 I have disclosed thesecombined materials after they have been removed from the mold 4 and subjected to an additional blowing operation.

When said combined materials assume the s ize indicated in outline by the dot and dash lines, Figure 4, the hinged sections 30 of the molding unit 28 are swung together so as to enclose the partially formed globe and'upon the introduction of additionalV air through the Ablow-pipe 26 said partially ,formed globe will bemol'ded into its-:requiredsshape'within the molding unitv 28, as clearly shown in Figur@ 4 ,f 1v. f-From the foregoing it' will #be understood that the-described molding apparatus', which is of very simple design and economical construction, provides a very convenient and effeetive means ,fer .producing multi-colored glass globes. VThecavity 18, Figure l, within the unitaryorbasemold sectionA isdesigned `to receive apredetermined. quantityfof colored glassand issorshaped thatwhenthe pellet or globule of lcoloreol-v glass'22. is deposited therein, it'will' of .its own self `seek-a `Yproper central position within 'saidcavity Hence when the clear:l or crystalpglass 24 is carried into association with.:the}.deposited globule 22, said globule will be uniiormly `spread so as to fiillthe marginalzport'i'onf the cavityl8 as welli as the; marginal portion `ot thefcavity 16adjacent thereto. ThisLfuniform spreading. of the, predetermined 'quantity or-globule :of colored E, glass 22 serves :to

rfacilitate the termination-ofthe :uppermost e -portionofsa-idv glass at the fedgepr'ridge portion 20 of the mold section 6 withfthe result thata'very sharp and uniform line ofdemarcation is established between .theunited glass materials. By having j the Vmolds "4 Yand12'8 designed asAdescribed,successive steps the I molding of 4the glassglobe-rnay vbe :conveniently produced .and a globe produced which has a uniform coating of coloredglass-disrtributed over the `surface oithe transparent glass. The uniformdistribution o fthecolored glass by :the use of V.Ir-1y improvedniold- Ying apparatus enables f. the manufacture l fof multi-colored globes whichy are-of al superior qualityA fromthe standpoint ,of `uniform, construction .and appearance i Obviously, Vthe lshape of the completedarticle `Will determine the shape of the molds whichY are to be ein?.

ployed, and Ftherefore it should be understood that myinvention is not limited tothe'patic'ular 'shapeofthe molds WhichiI hayejhere iii-before described." or Y yHaving thus described my invention, wl-iat I' claimas new and desire secure'by-Letl .Inlmolding apparatus4 forrprodu'cing glass -art-iclesv of thefclass described, annpper split -mold section`^, .a lower gfrneldgV 'orsupportin-gthe upper splitsectionyameld cavity b engzp re sented by; theccmbined flipper soY and lower sections which is adapted to receive a plurality of quantities of glass materials to be combined, said cavity having an inwardly v extending projection for limiting the displacement of molten glass material to thereby produce a sharp and uniform line of demarcation between the materials associated therewith, and a split mold for receiving the materials formed by the first mentioned mold, adapted to complete the shaping of said combined materials.

In witness whereof, I have hereunto subscribed my name.

J CHN EMERSON. 

